CENTRIFUGAL FAN Russian patent published in 1999 - IPC

FIELD: designing of general-purpose centrifugal fans. SUBSTANCE: the guide vanes are installed on the inlet pipe made in the form of a plate bent as a channel and shutting off the circulation clearance by its confusion outlet; the angle between the plate axis and the axis of impeller rotation makes up 35 to 40 deg, and the confusion angle in the plane parallel to the axis of rotation in the direction from the inlet to the outlet makes up 25 to 35 deg; the inclination of the channel wall in the vertical plane from the radial direction makes up 18 to 30 deg. EFFECT: enhanced turbulization of flow entering the circulation clearance, uninterrupted flow of medium on blade. 4 dwg